This Answer Record provides the test benches for 7 Series, Virtex-6 and Spartan-6 FPGA in attachments.
Use the following steps when you need to use those test benches.
If you are using ISIM, you can use the test benches (cfg_<family name>_<operation name>_tb.v files) only and ignore the .do files and simulation models because you have pre-compiled models in ISIM.
For older devices, (for example, Spartan-3 and Virtex-5), you also can find the test benches attached.
Refer to the Synthesis and Simulation Design Guide for more information about the Xilinx Configuration Simulation models.